149 questions and answers in this section

Natural Sciences » Chemistry

Explain why Marie Curie chose to dedicate herself to science.

Explain why Marie Curie chose to dedicate herself to science.

From childhood, Marie Curie naturally exhibited an insatiable curiosity about the functioning of the world around her. She loved to observe, question, and experiment patiently...

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Explain why do flames dance on a candle?

Explain why do flames dance on a candle?

A flame is a hot mixture of burning gases, primarily composed of wax vapor, oxygen, and various products resulting from their combustion, such as carbon...

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Explain why does coffee have such a distinct smell when freshly ground?

Explain why does coffee have such a distinct smell when freshly ground?

The magic of coffee lies largely in its aromatic compounds, those small molecules that give freshly ground coffee its irresistible aroma. When you break the...

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Explain why does a dressing separate into distinct layers if we do not stir it?

Explain why does a dressing separate into distinct layers if we do not stir it?

Oil is lighter than vinegar: its density is lower. In simple terms, for the same volume, oil weighs less. This is mainly due to the...

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Explain why molecular ingredients in perfumes create unique scents?

Explain why molecular ingredients in perfumes create unique scents?

The scents we love so much are actually a precise cocktail of various fragrant molecules. Some, rather fresh and fruity, come from esters, known for...

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Explain why tempered glass is more resistant than ordinary glass?

Explain why tempered glass is more resistant than ordinary glass?

Tempered glass is ordinary glass subjected to a specific thermal treatment. First, the glass is heated to a very high temperature (around 650 to 700°C)...

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Explain why does foam form when pouring beer?

Explain why does foam form when pouring beer?

When you pour a beer, you violently mix carbon dioxide (CO₂) with the beer, which had been quietly waiting in the pressurized bottle. The CO₂, suddenly released,...

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Explain why does mustard sting?

Explain why does mustard sting?

What makes mustard pungent is primarily a molecule called allyl isothiocyanate. Initially, mustard seeds contain two substances quietly sitting in their corner: a molecule called...

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Explain why do bath salts fizz in water?

Explain why do bath salts fizz in water?

Effervescent bath salts fizz due to a simple phenomenon: the interaction between an acidic ingredient (often citric acid) and a basic ingredient (most commonly baking...

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Explain why is friction necessary to light a match?

Explain why is friction necessary to light a match?

When you rub a match against the box, you turn your movement into mechanical friction. This friction is actually a resistance between two surfaces in...

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